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Altera_Forum's avatar
Altera_Forum
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16 years ago

PHY Layer FPGA

With all the applications for SERDES and 1000BASE products, I would think that there might be a device which I could program that will perform the 100BASE-TX and/or 100BASE-FX function that I am look...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

AM79C874 Running in 5B symbol mode.

The MII interface uses 5-bits to allow the CMD-n commands to be sent. Our protocol is a ring topology that passes a baton using CMD commands.

Our state machine (MAC) layer device handles the 4B/5B conversions.

I was hoping that the SERDES interfaces could be dissected enough to allow our customizing of a single channel to get the 125Mb data rate and also allow us to insert our own 4B/5B conversion module.

Sorry for taking so long to reply and thanks for your help!